It was a Friday night when Megan Jean Haines was told several complaints had been made against her by elderly residents at a NSW North Coast nursing home.
The following morning two of the residents who had complained about the 49-year-old nurse, were dead.
They had allegedly been injected with a fatal dose of insulin.
Ms Haines is on trial for the murder of Isabella Spencer, 77, and Marie Darragh, 82 who she allegedly killed while she was a nurse at St Andrews Village aged-care facility, Ballina.
She has pleaded not guilty to their murders.
On Tuesday, the NSW Supreme Court heard from the director of care Wendy Turner who outlined the complaints that had been made against Ms Haines.
She also explained how she had pulled Ms Haines aside the night before the alleged murders on May 9, 2014 and given her a sealed envelope containing details of the complaints.
The court heard that Ms Haines was officially cautioned and told there would be a meeting about the complaints on the following Tuesday, May 13.
During his opening address crown prosecutor Brendan Campbell alleged that Ms Haines, a registered nurse, was aware of the adverse impacts that complaints could have had on her career having faced disciplinary hearings in the past.
Under questioning from Mr Campbell, Ms Turner told the court she had personally spoken to one of the complainants, Ms Darragh, before she had confronted Ms Haines.
Ms Turner said Ms Darragh had explained to her how she had pulled down her blanket one night and asked Ms Haines to rub cream on a sensitive area that was itchy.
The accused allegedly responded to Ms Darragh's request by saying, "Cover yourself up, you look disgusting".
The court also heard how Ms Spencer had complained to staff about a time she asked Ms Haines for assistance to go to the bathroom.
Ms Haines allegedly told her to "piss in her pad".
A third resident complained of having her foot twisted when she was roughly handled by the accused.
Ms Darragh and Ms Spencer died on Saturday, May 10. The court heard Ms Haines rang up and verbally resigned on Tuesday, May 13.
Janet Parkinson, the daughter of the deceased Ms Darragh, gave evidence about how alert her mother was the day before her death.
Ms Parkinson explained how her mother had been singing at a concert and cracking rude jokes whilst continually looking around the room on Thursday, May 8 .
"She was very alert to the point where every time someone came in the side entrance of the dining hall she would jerk her head to the side as if she was frightened of something," Ms Parkinson said.
Ms Parkinson's voice began to crack when she spoke of the last time she had seen her mother conscious on Friday, May 9.
"I kissed her goodbye, I told her I loved her and I'd see her in the morning with pancakes."
The following morning she received a phone call from staff at St Andrews explaining that they believed her mother had suffered a "major stroke" and she died later that morning.
The trial continues before Justice Peter Garling.